Farm chemicals preparation for application on water

Application Number: 00108605
Application Date: 2000.03.03
Publication Number: 1269135
Publication Date: 2000.10.11
Priority Information: 1999/3/3 JP 55630/99
International: A01N25/34
Applicant(s) Name: Nippon Bayer Farm-Chemicals Co., Ltd.
Inventor(s) Name: Y. Nisch;A. Sato;T. Geto
Patent Agency Code: 72001
Patent Agent: wang jingchao
Abstract To obtain a controlled release preparation for application on water surface, capable of allowing an agrochemical active ingredient to be uniformly applied over the whole water surface of a paddy field and having controlled release thereof. This preparation for application on a water surface having a release-promoting activities of an agrochemical active ingredient and good in floating and traveling properties is obtained by allowing a granule nucleus to carry or to be coated with a powdery composition by using a mixture comprising a sorbitan (or sorbitol) fatty acid ester of a polyoxyethylene, or other oily surfactants. The granule nucleus is a fired pumice having <1 apparent specific gravity and about 500-1,400 &mu m particle diameter, and previously coated with a water-soluble polymer. The powdery composition comprises a hardly water-soluble agrochemical active ingredient, a dialky sulfosuccinate salt and other surfactants.